Running CrashPlan on older Linux

patch_inotify_init1.c

/*
 * $ gcc -Wall -shared -fPIC -o patch_inotify_init1.so patch_inotify_init1.c
 *
 * LD_PRELOAD=patch_inotify_init1.so java ...
 *
 * [11.27.15 12:43:37.040 ERROR main         .service.backup.BackupController] Exception setting up BackupController! , java.lang.UnsatisfiedLinkError: Error looking up function 'inotify_init1': /usr/local/crashplan/jre/bin/java: undefined symbol: inotify_init1
 * STACKTRACE:: java.lang.UnsatisfiedLinkError: Error looking up function 'inotify_init1': /usr/local/crashplan/jre/bin/java: undefined symbol: inotify_init1
 *         at com.sun.jna.Function.<init>(Function.java:208)
 *         at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:536)
 *         at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:513)
 *         at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:499)
 *         at com.sun.jna.Library$Handler.invoke(Library.java:199)
 *         at com.sun.proxy.$Proxy35.inotify_init1(Unknown Source)
 *         at com.code42.jna.LinuxPlatform.inotifyInit1(LinuxPlatform.java:292)
 *         at com.code42.jna.inotify.InotifyManager.start(InotifyManager.java:207)
 *         at com.code42.jna.inotify.JNAInotifyFileWatcherDriver.<init>(JNAInotifyFileWatcherDriver.java:61)
 *         at com.code42.backup.path.BackupSetsManager.initFileWatcherDriver(BackupSetsManager.java:417)
 *         at com.code42.backup.path.BackupSetsManager.setUp(BackupSetsManager.java:153)
 *         at com.code42.backup.BackupManager.setUp(BackupManager.java:141)
 *         at com.backup42.service.backup.BackupController.setUp(BackupController.java:467)
 *         at com.backup42.service.CPService.start(CPService.java:665)
 *         at com.backup42.service.CPService.main(CPService.java:2239)
 * 
 * [11.27.15 12:43:37.040 INFO  main         .service.backup.BackupController] BackupController.setup(): EXIT
 * 
 * If you get "Unable to add watch for path ..., errno: , 28" in service.log.0, then:
 *
 * $ echo 1048576 > /proc/sys/fs/inotify/max_user_watches
 * sysctl.conf: fs.inotify.max_user_watches=1048576
 *
 * bin/CrashPlanEngine:
 *
 *     nice -n 19 env LD_PRELOAD=$TARGETDIR/patch_inotify_init1.so $JAVACOMMON $SRV_JAVA_OPTS -classpath $FULL_CP com.backup42.service.CPService > $TARGETDIR/log/engine_output.log 2> $TARGETDIR/log/engine_error.log &
 */

#include <stdio.h>
#include <sys/inotify.h>

int inotify_init1(int flags)
{
        if (flags != 0) {
                fprintf(stderr, "inotify_init1(%d) -- BEWARE!  Ignoring flags.\n", flags);
        }

        return inotify_init();
}

Very very smart solution! I went the hard way, cross building a version of glibc that includes inotify_init1 for QNAP devices :-)

thanks - this is awesome! (I'm also using QNAP so I have to thank @dynek as well!)

awesome!
finally a working solution.
thank u so much

Awesome, thank you!